polkadart

Description:

polkadart

Polkadart #
Provides a clean wrapper around all the methods exposed by a Polkadot/Substrate network client and defines all the types exposed by a node.
Running Example #
Fetch the dependencies by running:
dart pub get
# Run the example
dart run multisig_example.dart
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Usage #
import 'package:polkadart/polkadart.dart' show Provider, StateApi;

void main() async {
final polkadot = Provider(Uri.parse('wss://rpc.polkadot.io'));
final api = StateApi(polkadot);
final runtimeVersion = await api.getRuntimeVersion();
print(runtimeVersion.toJson());
await polkadot.disconnect();
}
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Multisig #
Initiate Multisig (Create and Fund) #
final provider = Provider.fromUri(Uri.parse('wss://westend-rpc.polkadot.io'));

// Signatory 1
final keypairS1 = await keyring.KeyPair.sr25519.fromUri('//keypairS1');

// Signatory 2
final signatory2Address = '5Cp4.......';

// Signatory 3
final signatory3Address = '5Dt2.......';

// Recipient's Address
final recipientAddress = '5Fq3.......';

///
/// Create and Fund Multisig
final multiSigResponse = await Multisig.createAndFundMultisig(
depositorKeyPair: keypairS1,
otherSignatoriesAddressList: [signatory2Address, signatory3Address],
threshold: 2,
recipientAddress: recipientAddress,
amount: BigInt.parse('7000000000000'), // 7 WND ~ (tokenDecimals: 12)
provider: provider,
);

// Json Response for forwarding to other signatories.
final json = multiSigResponse.toJson();

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ApproveAsMulti #
Used to approve the multisig call and then it waits for other singatories to approve.
// Signatory 2
final keypairS2 = await keyring.KeyPair.sr25519.fromUri('//keypairS2');

// Json for forwarding to other signatories.
final json = multiSigResponse.toJson();

// Assuming keypairS2 is the first signatory who is approving.
final localResponse = MultisigResponse.fromJson(json);

// Waiting for approx 15 seconds for the transaction to be included in the block.
await Future.delayed(Duration(seconds: 15));

// Approve this call by keypairS2 and wait on further approval.
await localResponse.approveAsMulti(provider, keypairS2);

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AsMulti #
Used to do the final approval of the multisig call and execute the transaction if the threshold is met.
// Signatory 3
// Assuming keypairS3 is the first signatory who is approving.
final keypairS3 = await keyring.KeyPair.sr25519.fromUri('//keypairS3');

// Json for forwarding to other signatories.
final json = multiSigResponse.toJson();

final localResponse = MultisigResponse.fromJson(json);

// Waiting for approx 15 seconds for the transaction to be included in the block.
await Future.delayed(Duration(seconds: 15));

// Approve this call by keypairS3 and execute the transaction if the threshold is met
await localResponse.asMulti(provider, keypairS3);
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cancelAsMulti #
Used to do cancel the multisig call.
// Signatory 1
// Assuming keypairS1 is the first signatory who is approving.
final keypairS1 = await keyring.KeyPair.sr25519.fromUri('//keypairS1');

// Json for forwarding to other signatories.
final json = multiSigResponse.toJson();

final localResponse = MultisigResponse.fromJson(json);

// Waiting for approx 15 seconds for the transaction to be included in the block.
await Future.delayed(Duration(seconds: 15));

// Approve this call by keypairS1 and execute the transaction if the threshold is met
await localResponse.asMulti(provider, keypairS1);
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Tutorials #
Looking for tutorials to get started? Look at example for guides on how to use the API to make queries and submit transactions.

License

For personal and professional use. You cannot resell or redistribute these repositories in their original state.

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